Sen. Lisa Murkowski (R) of Alaska prepares to file her write-in candidacy with the state division of elections in Anchorage, Alaska, on Oct. 13. Michael Dinneen/AP

First lady Michelle Obama appears with US Senate candidate Alexi Giannoulias, at a campaign fundraiser in Chicago, on Oct. 13. Giannoulias faces Republican Congressman Mark Kirk, in the November election for President Obama's old Senate seat. M. Spencer Green/AP

In this Sept. 23 photo, Republican Senate candidate Linda McMahon tours a Spanish supermarket in New Haven, Conn. This election season, McMahon and other wealthy newcomers, such as Meg Whitman, former eBay CEO and the Republican candidate for governor in California, and Rick Scott, Florida's Republican gubernatorial candidate and former head of Columbia/HCA health care company, have spent millions on consultants who handle everything from television and direct mail advertising to advice on economic policy. Jessica Hill/AP

John Parkhurst studies the ballot as he votes during the first day of early voting on Oct. 13, in Gallatin, Tenn. State election officials expect the turnout to beat the previous record for a non-presidential year. Mark Humphrey/AP

California Democratic gubernatorial candidate Jerry Brown speaks at a news conference following his debate with his Republican opponent Meg Whitman at Dominican University in San Rafael, California, on Oct. 12. Robert Galbraith/Reuters

California Republican gubernatorial candidate Meg Whitman gestures at a news conference following her debate with Democratic candidate Jerry Brown at Dominican University in San Rafael, Calif., on Oct. 12. Robert Galbraith/Reuters

In this Oct 12 photo, Tarryl Clark, Democratic candidate for Congress in Minnesota's 6th District, poses for pictures with supporters after a debate in Stillwater, Minn. Clark is running against incumbent Republican Rep. Michele Bachmann and the Independence Party's Bob Anderson in the Nov. 2 election. Andy King/AP

Vice President Joe Biden speaks as Illinois Gov. Pat Quinn applauds at a 'Putting Illinois Back to Work' rally, on Oct. 12, in Chicago. Quinn faces Republican Bill Brady, a state senator, in the November election for governor. M. Spencer Green/AP

Supporters of Republican gubernatorial candidate Meg Whitman and Democratic gubernatorial candidate Jerry Brown carry signs at a rally at Dominican University in San Rafael, California, on Oct.12. Robert Galbrait/Reuters

Sen. Barbara Boxer (D) of California looks up while marking her absentee ballot as she votes in her campaign for re-election, at the Registrar-Recorder's office in Riverside, Calif., on Oct. 12. Boxer faces Republican Carly Fiorina in the November general election. Reed Saxon/AP

Former President Bill Clinton stumps for New York's 22nd District Rep. Maurice Hinchey, at a rally in support of his re-election in Binghamton, N.Y., on Oct. 11. Heather Ainsworth/AP

City worker Anthony Fullard cleans up after a rally in Philadelphia, on Oct. 10. The gathering was held to generate Democratic enthusiasm before crucial congressional elections. Matt Rourke/AP

In this Oct. 7 photo, President Obama waves to the crowd with House Majority Leader Steny Hoyer (D) of Maryland, at a re-election campaign stop for Maryland Gov. Martin O'Malley, at Bowie State University in Bowie, Md. Despite polls indicating many minority voters are discouraged and won't turn out Nov. 2 like they did for Obama two years ago, a solid showing among blacks could still swing several House, Senate and gubernatorial races, according to some analysts. Jacquelyn Martin/AP

In this Sept. 6 photo, Sen. Barbara Boxer (D) of Calif., (r.) greets union members at a Labor Day Breakfast, in Los Angeles. While Democrats across the country appeared to be struggling in their election bids, Boxer and others nationwide have recently gained ground in polls. Suddenly, Democrats are seeing glimmers that maybe Election Day won't also be doomsday. Jason Redmond/AP

A billboard near downtown Denver carries a political message on Oct. 6. This election season has brought a torrent of campaign spending from outside interest groups, and nowhere is the spending on better display than in Colorado. Ed Andrieski/AP

Assailed first by a debt crisis, then acting as a front line in Europe’s migrant crisis, Greece has had an extremely difficult few years. Yet it has avoided civil conflict and has remained in the eurozone, contrary to many expectations.